The effluents of drain water are seriously affected by soil, domestic and industrial wastes of the area. Such wastes in quality and quantity depend upon the rate of urbanisation, industrial growth, social changes and agro-revolutions. Under developed areas in India like one under such a phase. The effluents of drains at Mariahu Municipal Board, Jaunpur, have been periodically analysed for the physico-chemical parameters and their periodic variations have logically been explained with their effects on the bio-diversity of the ecosystem.